The Kjus Tracker Short Sleeve Tee is a great choice for warm weather adventures The lightweight HeiQ fabric provides maximum breathability and moisture wicking to keep you dry The Tracker Tee stretches for comfortable movement and it resists odor buildup to keep you fresh 59pct polyester/41pct polypropylene fabric Lightweight and breathable to keep you comfortable Fast drying and moisture wicking to keep you dry HeiQ silver fibers resist odor buildup HeiQ adaptive fibers respond to excess body heat with increased moisture wicking Flatlock seams feel soft against skin